[FORM ISSUE] Text color of the disabled fields

As you can see the color of the form title is clearly white, while the color of form values is greyish. The problem seems related to the property "disabled" of input html element, because removing this the fields become white (ex. London). So we force in css with this:

input[disabled], textarea[disabled] {
color: white !important;
}

but the problem remains.
Definition and creation of the form fields have been made dynamically but the result is the same: